deeply
The German word 'tief' is used to express the English word 'deeply' in various contexts. It can refer to a deep level, a deep emotion, or a deep thought. For instance, 'Ich liebe dich tief' means 'I love you deeply'. In a different context, 'tief in Gedanken' means 'deep in thought'. However, 'tief' can also be used as an adjective to describe physical depth, such as 'ein tiefer See' meaning 'a deep lake'.
The water is very deep.
This sentence is used to describe the depth of a body of water. It's a simple use of the adjective 'tief' meaning 'deep'.
He thinks deeply about the problem.
In this sentence, 'tief' is used as an adverb in the phrase 'tief nachdenken', which means 'to think deeply'. This is an example of how 'tief' can be used to describe the intensity or depth of an activity or feeling.
He is in deep sleep.
This is another usage of 'tief' in the context of describing a state or condition, in this case, a 'deep sleep'. The phrase 'tiefem Schlaf' is an example of the dative case in German, which is used after certain prepositions, certain verbs, or to indicate indirect objects.